L9396 datasheet(49/109 Pages) STMICROELECTRONICS

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DS12539 Rev 10

49/109

L9396

Remote sensor interface

109

Any WSI interface is configured by a 10-bit field according to the following format.

Bit 3

WSI_FIX_THRESH: WSI selection

of fixed or auto adaptive thresholds

0 => auto adaptive thresholds

1 => fixed thresholds

SSM_RESET

LBIST

Bit 2

WSFILT_CONF (see bits 6 to 9)

SSM_RESET

LBIST

Bit 1:0

STS: Sensor Type Selection

00 => Two level, Standard

01 => Three level, VDA

10 => PWM Encoded, 2 level, 2

edges/tooth

11 => PWM Encoded, 2 level, 1

edge/tooth

SSM_RESET

LBIST

Table 24. RS_CFG_2_3 register

ADDR

Name

Type

Bits = 20

0001101

RS_CFG_2_3

Config3 Range ch3= 19:10, Config2 Range ch2 = 9:0;

Table 25. RS_CFG_2_3 register bit description

Data Field

Description

Reset Value

Reset Event

Bit 19:16

WSFILT[3:0]: Wheel Speed filter

time selection (500 ns per bit)

If WSFILT_CONF=0:

0000 => 8 µs

----- => 500 ns per bit

1111 => 15.5 µs

If WSFILT_CONF=1:

xx00 => 8 µs, xx01 =>15 µs,

xx10 => 30 µs, xx11 => 50 µs

SSM_RESET

LBIST

Bit 15

WSIPTEN: Pass Through mode

enable (valid only for PWM

encoded sensors)

0 => Off

1 => On

SSM_RESET

LBIST

Table 23. RS_CFG_0_1 register bit description (continued)

Data Field

Description

Reset value

Reset Event

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